The turbulence model was employed to simulate film cooling effect of blade with four radius of curvatures in rotating state.The effects of curvature and rotating number on film cooling performance of the convex surfaces and concave surfaces was investigated

under conditions with blowing ratio of 0.5and1.5

and the rotating number of 0.037 68

0.075 36 and 0.113 04.The results show that

with a constant rotating number

the lower the radius of curvature

the more obvious the gas film deflection of the convex surfaces and concave surfaces.Increasing the radius of curvature will enlarge the area of convex surface with high Nunumber and enhance the heat transfer

while the concave surfaces had the opposite results.In addition

increasing the rotating number will weaken the heat transfer on convex surfaces with low radius of curvature and that on concave surfaces with high radius of curvature.